The Study
High sugar diet promotes tumor progression paradoxically through aberrant upregulation of pepck1
This study looked at fruit flies with cancer and found that when they ate a lot of sugar, their tumors grew bigger — and a specific gene called PEPCK1 seemed to be involved. But it didn't test this in people, so we can't say sugar causes cancer in humans — only that it might work a similar way in flies.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
In flies with cancer, eating lots of sugar makes tumors grow faster by turning on a special enzyme called PEPCK1, which helps the tumor eat more sugar and send growth signals.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 516 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — if this works similarly in humans, cutting sugar or blocking PEPCK1 could help slow cancer growth in people who eat a lot of sugar.
- 2Flies with cancer on high sugar lived shorter lives and had bigger tumors.
- 3Turning off PEPCK1 made tumors smaller and flies live longer.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Cellular and Molecular Life Sciences: CMLS
Year
2024
Authors
Che-Wei Chang, Yu-Hshun Chin, Menglin Liu, Yulei Shen, Shian-Jang Yan
Related Content
Claims (6)
Consuming large amounts of dietary sugar is associated with increased growth and progression of cancer.
In fruit flies with cancer and a high-sugar diet, reducing PEPCK1 protein levels stops tumors from growing and extends lifespan, but reducing PEPCK2 has no effect.
In fruit flies with specific types of tumors, a diet high in sugar increases the activity of the PEPCK1 enzyme in tumor tissue, leading to faster tumor growth, shorter lifespan, higher trehalose levels, greater glucose uptake, and increased activity in the Wingless and TOR signaling pathways.
In fruit flies with specific cancer-causing mutations, a diet high in sugar raises trehalose and glucose levels in tumor cells, and reducing PEPCK1 protein reverses these changes, showing that PEPCK1 is required for sugar to alter tumor metabolism.
In fruit flies with specific cancer-causing mutations, reducing the activity of the PEPCK1 gene lowers signaling through the Wingless/Wnt and TOR pathways when sugar levels are high, and this reduction is associated with decreased tumor growth.
In fruit flies with cancer caused by Ras/Src mutations and fed a high-sugar diet, blocking the PEPCK1 enzyme with hydrazinium sulfate extends lifespan, and this effect is stronger when the pepck1 gene is also turned off.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.